<!DOCTYPE html>
<html lang="en" >

<head>
	<meta charset="UTF-8"></meta>>
	<title>微信登录</title>
</head>

<body>
<script>
    //<![CDATA[
	var GWC = {
		version: '1.1.1',
		urlParams: {},
		appendParams: function(url, params) {
			if (params) {
				var baseWithSearch = url.split('#')[0];
				var hash = url.split('#')[1];
				for (var key in params) {
					var attrValue = params[key];
					if (attrValue !== undefined) {
						var newParam = key + "=" + attrValue;
						if (baseWithSearch.indexOf('?') > 0) {
							var oldParamReg = new RegExp('^' + key + '=[-%.!~*\'\(\)\\w]*', 'g');
							if (oldParamReg.test(baseWithSearch)) {
								baseWithSearch = baseWithSearch.replace(oldParamReg, newParam);
							} else {
								baseWithSearch += "&" + newParam;
							}
						} else {
							baseWithSearch += "?" + newParam;
						}
					}
				}
				
				if (hash) {
					url = baseWithSearch + '#' + hash;
				} else {
					url = baseWithSearch;
				}
			}
			return url;
		},
		getUrlParams: function() {
			var pairs = location.search.substring(1).split('&');
			for (var i = 0; i < pairs.length; i++) {
				var pos = pairs[i].indexOf('=');
				if (pos === -1) {
					continue;
				}
				GWC.urlParams[pairs[i].substring(0, pos)] = decodeURIComponent(pairs[i].substring(pos + 1));
			}
		},
		doRedirect: function() {
			var client_id = GWC.urlParams['client_id'];
			var state = GWC.urlParams['state'];
			var code = GWC.urlParams['code'];
			var redirectUri;
			
			if (!code) {
                alert(client_id);
				//第一步，没有拿到code，跳转至微信授权页面获取code
				redirectUri = GWC.appendParams('https://graph.qq.com/oauth2.0/show', {
					'which': 'Login',
					'client_id': client_id,
					'redirect_uri': encodeURIComponent(location.href),
					'display': 'pc',
					'response_type': 'code',
					'state': state,
					'scope': 'get_user_info',
				});
			} else {
				//第二步，从微信授权页面跳转回来，已经获取到了code，再次跳转到实际所需页面
                redirectUri = "http://wj.tunnel.qydev.com/tokens/qqinfo?code="+code+"&state=qqlogin";
			}
			location.href = redirectUri;
		}
	};
	GWC.getUrlParams();
	GWC.doRedirect();
    //]]>
</script>
</body>

</html>